Need help using an amplifier board from a Panasonic SA-AK22 RSN3502c

So I bought a Panasonic SA-AK22 boombox about 14 years ago for my mother now she don&want it. I need help utilizing the amplifier board ,where is the input for the volts and how many amps should I use amps to ? and the left right channel low signal .it has a BC power module RSN3502c .It have a ribbon that came from the transformer side and some other pins .I know ppl from Brazil love this. Thanks